'Annihilated' in the Bible

The Ammonites and Moabites turned against the inhabitants of Mount Seir and completely annihilated them. When they had finished with the inhabitants of Seir, they helped destroy each other.

Who among all the gods of these nations whom my predecessors annihilated was able to rescue his people from my power?

and the Lord sent an angel who annihilated every brave warrior, leader, and commander in the camp of the king of Assyria. So the king of Assyria returned in disgrace to his land. He went to the temple of his god, and there some of his own children struck him down with the sword.